Webster

i did a new install to use 1.5 so i never loaded 1.4

the files im talking about are the temp internet files not storage files and the disk cleanup utility will purge them. you can decide how much space is used by your computer so its not about how big your hard drive is. they fill up as you use the computer so a large download or large game save can fill it up with a gig or two of data which could, i repeat could, have a slowing down effect on game saves and if it needs more room it dumps some data to make room for new data. its mainly for storing copies with all the details of web pages so they pop up faster, it doesnt have to ask what to put where because it already has this info stored in the temp files memory. its also how the computer can start right back up at the spot you paused it without reloading and without missing a beat, thats the temp files storing all that data but as the name says its temporary so it changes by what your doing.

if you've got a up to date system it should be fine though.